TM701A TM-701A REPEATER CROSS-BAND MODIFICATION (REVISED) Perform the following modifications to allow the TM-701A to operate in the repeater cross-band mode. MODIFICATION: 1. Disconnect the power supply and antenna. 2. Remove the top and bottom covers (12 screws). Disconnect the speaker wire from the transceiver. 3. Locate the green jumper wire show in figure 1. Using a sharp pair of wire cutters, cut the jumper in half.(green jumper) CAUTION: Cutting the green jumper allows the TM-701A to transmit from 142 to 151.995 MHZ. Protect your license by only using frequencies that you are authorized to transmit on. 4. Solder a jumper wire to the foil side of the TX-RX board as shown in figure 2. 5. Assemble the transceiver by reversing steps 1 -2. 6. Reset the microprocessor by holding in the MR key as the power is turned on. The repeater cross-band operation allows the TM-701a to receive on one band and re-transmit the signal on the other band. The TM-701a alternately displays the two bands until a signal is received. The transceiver will then display the band that is re-transmitting the signal. The SHIFT function cannot be used during the repeater cross- band operation. If the TONE or CTCSS function is required, only one ETA tone can be used for the two bands. CONTINUED IN FILE TM701A.2 TM701A.2 OPERATING PROCEDURE 1. Select the operating frequencies for both bands. 2. Set the squelch control to the threshold point. The TM-701a will transmit in the repeater cross-band mode if the squelch control is set too low or a signal is received. 3. Place the transceiver in the duplex mode (F + DUP). 4. Press the F key for longer than one second. The F indicator will flash. 5. Press the LOW key. The transceiver will now enter the repeater cross-band mode of operation. 6. To cancel the operation and return to the VFO mode, press the VFO key. CONTINUED IN FILE TM701A.1 TM701A.1 Figure 2 rear of radio ------------------------------------------------------ ! ! ! ! ! o ! ! o ! ! o ! ! o ! ! o o ! ! o o ! ! o o ! ! o o ! ! o o ! ! __add__________Xo ! ! i o ! ! i o ! ! i ! ! i ooooooooooooooooooooooooooooooo ! ! i ! ! -------i ! ! i ! ! Xo@o ! ! ! ! ooooooooooooooo ! ! oooooooooooooooooooo ! _____________________________________________________ mic plug (radio bottom) (Jumper wire from X to X)